# Worksheet: Series Circuits

In this worksheet, we will practice calculating the potential difference, current, and resistance at different points within simple series circuits.

**Q4: **

The circuit in the diagram consists of two resistors in series, with ammeters, , , and , placed at different points in the circuit. reads 4 A.

What is the current given by the second ammeter, ?

What is the current given by the third ammeter, ?

**Q5: **

A student sets up the circuit shown in the diagram. She uses a voltmeter to measure the potential difference across and finds it to be 4 V. She then uses a voltmeter to measure the potential difference across and finds it to be 10 V. What is the potential difference across both resistors together?

**Q6: **

The circuit in the diagram consists of two resistors in series. What is the total resistance of the two resistors?

**Q7: **

A student sets up the circuit shown in the diagram. If the value of is 3 Ω, what is the current through the circuit?

**Q8: **

The circuit shown in the diagram consists of three resistors connected in series with a cell. The first resistor has a resistance of , the second resistor has a resistance of , and the third resistor has a resistance of . The cell provides a potential difference of 24 V. The current through the circuit is 0.1 A. What is the value of ?

**Q9: **

The diagram shows a circuit consisting of a cell and two resistors connected in series. If the total resistance of the circuit is 20 Ω, what is the value of ?

**Q10: **

The diagram shows two circuits. Are the two circuits equivalent to each other? If not, why not?

- A No, because the resistors are in different positions.
- B No, because the current goes a different way around the circuit in the second circuit.
- C No, because the cell is the opposite way around in the second circuit.
- D No, because the first circuit shows which side of the cell is positive and which is negative but the second circuit does not.
- E Yes, the two circuits are equivalent.

**Q11: **

The circuit shown in the diagram has a current of 0.5 A through it. What is the value of the potential difference across the resistor labeled ?

**Q12: **

The circuit shown in the diagram has a current of 0.5 A through it. What is the value of ?

**Q13: **

A student sets up the circuit shown in the diagram. The voltmeter reads 10 V. What is the potential difference across all three resistors together?

**Q14: **

The diagram shows four circuits. Which circuit shows two diodes and a filament lamp connected in series?

- A(d)
- B(b)
- C(c)
- D(a)